US5154009A - Journal for a hollow roll body, specifically for a drying cylinder of a paper machine - Google Patents

Journal for a hollow roll body, specifically for a drying cylinder of a paper machine Download PDF

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Publication number
US5154009A
US5154009A US07/494,847 US49484790A US5154009A US 5154009 A US5154009 A US 5154009A US 49484790 A US49484790 A US 49484790A US 5154009 A US5154009 A US 5154009A
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United States
Prior art keywords
journal
hollow shaft
annular
space
hollow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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US07/494,847
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English (en)
Inventor
Werner Kade
Wolfgang Breuninger
Ernst Przibylla
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JM Voith GmbH
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JM Voith GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements

Definitions

  • the present invention concerns a journal through which flows a heat transfer medium and which is designed as a hollow shaft for a hollow roll body, specifically for a steam-heated drying cylinder of a paper machine, wherein thermal insulation formed by a coaxial annular space is provided between the interior space of the hollow shaft and a bearing supporting it.
  • Configurations of that type are known and are used specifically in conjunction with steam-heated drying cylinders of the drying section of a paper machine. These drying sections serve to dry the paper web that has been dewatered in the press section but is still moist (dry content of 35-50%); the residual water is evaporated in the drying section.
  • the drying section itself consists of steam-heated drying cylinders that can be combined into controllable groups.
  • the drying cylinders are generally heated with steam at a pressure up to about 10 bars.
  • the steam enters sideways through the journals of the drying cylinders.
  • the heat released as the steam condenses is conducted through the relatively thin cylinder walls to the paper web, drying it slowly.
  • the accruing condensate is removed by means of rotating or fixed siphons, generally through the same journal through which the steam is admitted.
  • the maximum temperature in the drying cylinders is about 120°-190° C.
  • the steam is admitted through a drying cylinder journal which is fashioned as a hollow shaft or a hollow cylinder.
  • the accruing condensate is then removed by way of the same journal or also a second journal.
  • Antifriction bearings specifically self-aligning roller bearings are used for the rotatable mounting of the drying cylinder. These bearings are arranged, for one, on the journals fashioned as a hollow shaft and which, on the other hand, bear on suitable pillow blocks.
  • the varying operating temperature developing in the bearing affects the lubricating properties and service life of the lubricating oil.
  • U.S. Pat. No. 2,413,567 is a drying cylinder wherein the cylinder plates delimiting the interior of the cylinder each include a molded hollow journal and an additional, bolted hollow journal which accommodates the bearing.
  • a stationary device which extends through the molded hollow journal and is sealed relative to the hollow journal by means of packing chambers.
  • the mentioned means for thermal insulation of the bearings consist of a socket of insulating material which is slipped on the molded hollow journal, the outside diameter of which socket is so selected that an air gap is present between the socket and the bolted hollow journal. Due to the two-part journal, this design is relatively expensive.
  • U.S. Pat. No. 2,817,908 depicts a drying cylinder for paper machines with a double-wall steam inlet pipe wherein the annular space between the two walls acts as an insulation layer. Another thermal insulating space is provided between the outer wall of the steam inlet pipe and the hollow journal itself.
  • the double-wall steam inlet pipe is, on one end, screwed to the hollow journal while on the other end a movable packing is provided.
  • This packing allows for the fact that the steam inlet pipe expands in the axial direction more than does the hollow journal, and it seals the thermal insulating space between the steam inlet pipe and the hollow journal. In practical use, however, this concept has proved to be problematic as the space cannot be dependably sealed in the long run. Condensate accumulates in the course of time in this intermediate space and the thermal insulating effect is increasingly lost.
  • thermal insulating annular space between the two walls of the steam inlet pipe it can be durably sealed. But considering that these two walls vary in their axial expansion, an equalization element needs to be provided, for instance a bellows.
  • U.S. Pat. No. 3,224,110 shows a drying cylinder where the annular space between a condensate outlet pipe and a hollow journal is filled with thermal insulating material.
  • a movable packing needs to be provided, the service life of which naturally is limited. Once the effect of the packing is reduced, condensate will eventually seep into the thermal insulating material, so that the insulating effect will be increasingly lost.
  • Another proposal which has become known for the solution of the initially mentioned problem consists of compensating for the operationally developing temperature difference between the inner and outer races of the antifriction bearing means of a cooling device provided in or on the antifriction bearing, or to at least minimize the temperature difference. This proposed solution has been demonstrated to be insufficient.
  • the problem underlying the present invention consists of providing a journal of the catel type which is of simple design and wherein the thermal insulation between the cylinder bore of the hollow shaft serving as a pipe for the heat transfer medium and the inner race of the antifriction bearing is so conceived that no condensate can penetrate and reduce the insulating effect.
  • the insulation comprises a coaxial annular space formed between the inside wall of the hollow shaft and its outside wall accommodating the bearing.
  • journal according to the instant invention is that no additional component is needed in the interior space of the hollow shaft for thermal insulation and that, for another, the risk of condensate penetration in the insulation is eliminated.
  • journal according to the instant invention is the fact that, in the case of maintenance or repair work, the journal can be installed and removed as a complete unit and that, due to the specific design of the journal in view of the thermal insulation between the cylinder bore and the inner race of the antifriction bearing, this journal and the thermal insulation have long durability and utility.
  • this coaxial annular space can be realized by machining or casting using core elements; additionally, the annular space can be filled with a suitable thermal insulating material.
  • annular space by casting offers the additional possibility of adapting the core, and thus the annular space, to the outer contour of the outside wall of the journal, so as to deliberately influence the heat transfer between the inner and the outer wall.
  • a particular embodiment of the annular space provided by casting consists in forming it by a cast-in double-walled body from plate.
  • FIG. 1 shows a drying cylinder of a paper machine in cross section
  • FIG. 2 is a cross sectional illustration of a first embodiment of an annular space between the inside and outside wall of the journal fashioned as a hollow shaft;
  • FIG. 3 is a cross sectional illustration of a second embodiment of an annular space between the inside and outside wall of the journal fashioned as a hollow shaft;
  • FIG. 4 is a cross sectional illustration of a third embodiment of an annular space between the inside and outside wall of the journal fashioned as a hollow shaft;
  • FIG. 5 is a cross sectional illustration of a fourth embodiment of an annular space between the inside and outside wall of the journal fashioned as a hollow shaft.
  • FIG. 1 Illustrated in FIG. 1 is a drying cylinder 1 of a drying section of a paper machine, which drying cylinder consists of a relatively thin-walled cylinder 2 and two end plates 3, 4 delimiting the cylinder 2. Defined is thus the interior space of the drying cylinder 1 or the condensate space for the saturated steam.
  • the two cylinder end plates 3, 4 each feature, coaxially, a journal 5, 6 which is fashioned as a hollow shaft and are each rotatably mounted through the intermediary of an--only schematically illustrated--antifriction bearing 7, 8 on a--not illustrated--pillow block.
  • the drying cylinder 1 rotates about its own axis. Moisture is removed from the paper web which, by a so-called drying felt, is forced on the cylinder 2. To accomplish this, the interior space of the drying cylinder 1 is charged with steam (arrow X) through the central bore of the--right hand in FIG. 1--journal 5. This steam condenses on the inside wall of the cylinder 2 in the area where the paper web loops around and is eventually removed again in the form of condensate through a siphon 9 (arrow Y).
  • journal 5- here the journal 5--serves as both a feed channel for the steam and as a conduit for the outlet channel of the condensate.
  • Steam and condensate are thus separately admitted and removed through a schematically illustrated steam head 10 which is flanged to the journal 5.
  • a schematically illustrated steam head 10 which is flanged to the journal 5.
  • the problem addressed by the present invention lies in the transitional area between the bore of the journal 5 through which the steam flows and the antifriction bearing 7.
  • the heat transfer in this area is to be so influenced that the operating temperature of the antifriction bearing as a whole will be maximally low and remain extensively consistent, i.e., that no appreciable temperature differences will occur between the inner and outer race.
  • FIG. 2 shows a first embodiment of an annular space 11 between the inside and outside wall of the journal 5 fashioned as a hollow shaft.
  • this journal 5 includes a mounting flange 12 through the intermediary of which it is bolted to the end plate of the drying cylinder. (Alternatively, journal and cylinder end plate may form a single-piece component).
  • an antifriction bearing 7 specifically in the form of a self-aligning bearing, which operationally bears on a pillow block.
  • journal 5 a rotary motion is imparted to the journal 5 through a--not illustrated--drive gear which is cut on the journal or attached to it, in which context it is pointed out that the coordination between mounting flange 12, antifriction bearing 7 and drive gear is basically selective, and at that, both in the spacing and relative coordination with one another.
  • the annular space 11 serving as thermal insulation between the central bore (serving as a conduit for the steam) and the antifriction bearing 7 has been machined as an annular groove from the outer end face of the journal 5.
  • This annular groove is cut by means of a specific crown bit (also called core drill), and at that, sufficiently deep to extend maximally far toward the end with the mounting flange 12. This interrupts the thermal bridge between the cylinder bore 13 and the inner race of the antifriction bearing 7 across the entire circumference, so that said inner race will extensively escape a thermal influence.
  • a steam head contained on the outer (left in FIG. 2) end of the journal 5 has been omitted in FIG. 2.
  • the arrangement is such that the annular groove on the end face is kept open toward the surroundings so that there will be no way for condensate to accumulate in the annular groove.
  • the annular groove may also be filled with a suitable thermal insulating material.
  • annular groove according to FIG. 1 is not machined but produced by casting using a tubular core that is inserted in the casting operation.
  • this casting core can be adapted to the outside contour of the journal 5, and at that, insofar as the annular groove includes bulges which are consistent with the diameter of the journal 5 that increases toward the mounting flange 12.
  • the thermal insulation between the cylinder bore 13 and the bearing 7 can be further improved thereby.
  • radial bores--facultatively slotted bores 14-- may be provided in the are of the inside end of the annular groove so as to keep the annular groove open also from the second end.
  • these bores 14 can be realized by several, specifically four, core supports distributed in the form of an axial cross across the circumference, which are removed after casting. Obtained thereby--the same as in the case of the machined annular groove --is an annular space 11 which is open on both sides, which thus is continuously ventilated as a thermally insulating space between the central bore 13 and the bearing 7.
  • FIG. 3 shows a second embodiment of the annular space 11 which is produced as an annular hollow space, by casting, between the end faces of the journal 5, and at that, in the area between its central bore 13 and the bearing 7.
  • the core that determines the shape and dimensions of the annular space 11 is held in place through core supports. These and the core itself are removed after casting, forming an annular groove which, through radial ventilation openings 15, is open on both sides. Additionally shown in the example according to FIG. 3 is that by means of bulges 16, 17--previously mentioned in conjunction with FIG. 2--of the annular groove 11 it is possible to exert a defined influence on the material thickness of the journal between the annular groove and the outer wall accommodating the bearing 7.
  • FIG. 4 shows a third embodiment of the annular space 11. It is formed here by a ceramic tube which concentrically is cast into the journal 5 or--as illustrated--by a double-walled annular body 18 made from steel plate which, during the casting itself, is supported by, e.g., four steel pipes 19 that are arranged as an axial cross and open toward the interior of the annular body 18 from plate.
  • These steel tubes 19 preferably have an oval cross section, with the longitudinal axis of the oval being axially parallel.
  • the steel tubes serve as openings for creating and ventilation of the interior of the annular body 18 from plate, for another, can additionally be filled with a thermally insulating material.
  • FIG. 5 shows another, fourth embodiment.
  • the annular space has been formed by means of a core ring 20 from thermally insulating material, the ring being located by the casting. This is accomplished by slipping (and fixing) on the casting core a steel pipe 21 for the central bore 13 of the journal 5, appropriately coordinated with the position of the bearing 7.
  • the core ring 20 is then installed on this steel pipe 21, whereafter the journal 5 is cast.
  • the core ring is preferably designed conically and shorter than the steel pipe 21 so that, for one, allowance is made for the increasing material thickness of the journal 5 and, for another, the core ring 20 will on both end faces be backed off behind the steel pipe 21.
  • Created in casting is now a homogeneous central bore 13 which in part is formed by the steel pipe 21, the latter connecting with the casting of the journal 5 by implantation and firmly enveloping the core ring 20.
  • the thermally insulating annular space 11, 18, or 20, unlike in FIG. 2 does not extend up to the end of the journal 5 away from the flange, and is thus not open.
  • the area of the journal 5 away from the flange is thus not open.
  • the area of the journal 5 away from the flange is thus more rigid than is the case in the embodiment according to FIG. 2.
  • This configuration is thus better suited (if required) for accommodating a drive gear or an entire gear set, for instance a slip-on gear set.
  • the journal may also be part of a single-piece hollow shaft of a machine glazing or crepe cylinder, with the hollow shaft (comprising two journals) extending lengthwise through the cylinder.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Drying Of Solid Materials (AREA)
US07/494,847 1987-10-13 1990-03-14 Journal for a hollow roll body, specifically for a drying cylinder of a paper machine Expired - Fee Related US5154009A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873734524 DE3734524A1 (de) 1987-10-13 1987-10-13 Lagerzapfen fuer einen hohlen walzenkoerper insbesondere fuer einen trockenzylinder einer papiermaschine
DE3734524 1987-10-13

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US07248949 Continuation 1988-09-23

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US5154009A true US5154009A (en) 1992-10-13

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US07/494,847 Expired - Fee Related US5154009A (en) 1987-10-13 1990-03-14 Journal for a hollow roll body, specifically for a drying cylinder of a paper machine

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US (1) US5154009A (de)
JP (1) JPH01124698A (de)
AT (1) AT392662B (de)
BR (1) BR8805135A (de)
CA (1) CA1321302C (de)
DE (1) DE3734524A1 (de)
FI (1) FI884171A (de)
SE (1) SE467113B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353272B1 (en) 1997-05-30 2002-03-05 Delaval Stork V.O.F. Rotor shaft for a rotary machine and rotary machine provided with a rotor shaft of this kind
US6569493B2 (en) 2000-05-15 2003-05-27 Mead Westvaco Corporation Method of repairing a paper machine dryer journal moisture barrier
CN100504043C (zh) * 2007-08-24 2009-06-24 中冶长天国际工程有限责任公司 振动器的加热方法及实现该方法的振动器
US7841103B2 (en) * 2003-12-30 2010-11-30 Kimberly-Clark Worldwide, Inc. Through-air dryer assembly
CN113453813A (zh) * 2019-03-14 2021-09-28 未来股份公司 用于对纸幅类材料进行处理的压延机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151244A (en) * 1975-03-11 1979-04-24 Small Edward B Method of manufacturing pre-cast concrete panels
US4969197A (en) * 1988-06-10 1990-11-06 Murata Manufacturing Piezoelectric speaker
FI100200B (fi) * 1993-10-20 1997-10-15 Valmet Paper Machinery Inc Termotelan akselin eristyssovitelma ja eristyskappale
DE19726209A1 (de) * 1997-06-20 1998-12-24 Voith Sulzer Papiermasch Gmbh Beheizte Walze
DE19747555A1 (de) * 1997-10-28 1999-04-29 Voith Sulzer Papiertech Patent Heiz- und/oder kühlbarer Zylinder
DE20207824U1 (de) 2002-05-18 2003-10-02 Eduard Küsters Maschinenfabrik GmbH & Co. KG, 47805 Krefeld Walze
IT201900003713A1 (it) * 2019-03-14 2020-09-14 Futura Spa Calandra per il trattamento di materiali nastriformi.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413567A (en) * 1943-03-22 1946-12-31 Beloit Iron Works Drier drum having keat-exchangefluid supply and removal means
US2817908A (en) * 1954-08-19 1957-12-31 Beloit Iron Works Yankee drier
US3224110A (en) * 1961-01-25 1965-12-21 Scott Paper Co Rotary cylinder dryer
DE2104392A1 (en) * 1968-12-20 1972-08-17 Vepa Ag, Basel (Schweiz) Stretching roller - reducing heat transfer to roller journal by extension of thermally insulating layer
US4735262A (en) * 1987-02-20 1988-04-05 Duff-Norton Company Rotary steam joint

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5745461U (de) * 1980-08-29 1982-03-12
DE3140425A1 (de) * 1981-10-12 1983-04-21 Schwäbische Hüttenwerke GmbH, 7923 Königsbronn Vorrichtung zum erzeugen und/oder bearbeiten von bahnmaterial

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413567A (en) * 1943-03-22 1946-12-31 Beloit Iron Works Drier drum having keat-exchangefluid supply and removal means
US2817908A (en) * 1954-08-19 1957-12-31 Beloit Iron Works Yankee drier
US3224110A (en) * 1961-01-25 1965-12-21 Scott Paper Co Rotary cylinder dryer
DE2104392A1 (en) * 1968-12-20 1972-08-17 Vepa Ag, Basel (Schweiz) Stretching roller - reducing heat transfer to roller journal by extension of thermally insulating layer
US4735262A (en) * 1987-02-20 1988-04-05 Duff-Norton Company Rotary steam joint

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353272B1 (en) 1997-05-30 2002-03-05 Delaval Stork V.O.F. Rotor shaft for a rotary machine and rotary machine provided with a rotor shaft of this kind
US6569493B2 (en) 2000-05-15 2003-05-27 Mead Westvaco Corporation Method of repairing a paper machine dryer journal moisture barrier
US7841103B2 (en) * 2003-12-30 2010-11-30 Kimberly-Clark Worldwide, Inc. Through-air dryer assembly
CN100504043C (zh) * 2007-08-24 2009-06-24 中冶长天国际工程有限责任公司 振动器的加热方法及实现该方法的振动器
CN113453813A (zh) * 2019-03-14 2021-09-28 未来股份公司 用于对纸幅类材料进行处理的压延机
CN113453813B (zh) * 2019-03-14 2024-02-23 未来股份公司 用于对纸幅类材料进行处理的压延机

Also Published As

Publication number Publication date
SE8802864L (sv) 1989-04-14
AT392662B (de) 1991-05-27
FI884171A (fi) 1989-04-14
CA1321302C (en) 1993-08-17
BR8805135A (pt) 1989-05-16
DE3734524C2 (de) 1990-04-12
SE467113B (sv) 1992-05-25
DE3734524A1 (de) 1989-04-27
ATA185088A (de) 1990-10-15
JPH01124698A (ja) 1989-05-17
FI884171A0 (fi) 1988-09-09
SE8802864D0 (sv) 1988-08-11

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Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362